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Which hormone is present in greater concentration in areas of rapid cell division and promote cell division?
Abscisic acid
Gibberellins
Cytokinin
Auxins
Cytokinin
Cytokinins are a class of plant hormones that primarily promote cell division (cytokinesis) in plant roots and shoots. They are found in high concentrations in areas of rapid cell growth, such as seeds, fruits, and young leaves, where they interact with auxins to regulate the development of plant tissues.
Cytokinins are a class of plant hormones that primarily promote cell division (cytokinesis) in plant roots and shoots. They are found in high concentrations in areas of rapid cell growth, such as seeds, fruits, and young leaves, where they interact with auxins to regulate the development of plant tissues.
Think of cytokinins as the 'cell traffic controllers' that signal a construction site to add more workforce (new cells) exactly where and when the plant needs to grow faster.
CYTO-kinin = CYTO-kinesis (Cytokinesis literally means cell division).
Ratio=[Auxin][Cytokinin]тАЛ тАФ Determines the direction of plant organogenesis (shoot vs root)
Cytokinins promote cell division by stimulating the production of proteins required for the cell cycle, specifically facilitating the transition from the G2 phase to mitosis. They work in a complex hormonal balance with auxins; high cytokinin-to-auxin ratios promote shoot formation, while low ratios favor root development.
Cytokinins are adenine derivatives.
They delay senescence (aging) in leaves.
They are primarily synthesized in root tips and transported to other parts of the plant via the xylem.
Promotes rapid plant growth
Essential for tissue culture and plant propagation
Agriculture to increase fruit size
Plant tissue culture media to induce callus growth
Abscisic acid is a stress hormone that promotes dormancy, not division.
Auxins are primarily involved in cell elongation and apical dominance.
Gibberellins are mainly responsible for stem elongation and seed germination.
C is correct тАФ Cytokinin is the specific plant hormone responsible for promoting cell division (cytokinesis).
Remember: Auxin = Elongation, Cytokinin = Division (Cytokinesis). They are the 'yin and yang' of plant growth.
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